High RTT and packet Loss

[cnrs-dsi]

Hi

We use a WLC 4402 and 11 AP 1250.

My clients are Windows seven.

When they are connected to wireless, all my clients have randomly RTT peaks and packets Loss (2% average).

I enable link latency between AP and WLC. Max RTT are from 20 to 64ms.

Any idea ?

Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=5 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Délai d'attente de la demande dépassé.
Réponse de 172.16.242.9 : octets=32 temps=446 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=1 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=8 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=50 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=93 ms TTL=64
Délai d'attente de la demande dépassé.
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=4 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=2 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64

[Stephen Rodriguez]

Honestly, to be expected.  Wireless is a shared media, so if client A is talkling, client B can not.  This is going to have some inherent loss, due to this.

Cheers,
Steve

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[wireless wlc]

At what signal strengths are you seeing these losses ?

regards

Joe

[cnrs-dsi]

91% (-54dB)

I'am really close from the AP.

[George Stefanick]

Do you have power save mode enabled on your client ? Is so, disable and you should see some improvment. Although, look at what you posted this is normal behavor..

[wireless wlc · Accepted solution]

Normally you should not have timeouts at this signal strength. What are you trying to ping by the way ?

any server on the LAN ? If its on the LAN and still getting timeouts, guess you should look at any interference sources which are operating on the same channel and eating up duty cycle.

regards

Joe

[George Stefanick]

Perhaps the cleint is roaming ... You will lose a ping or two ...

[cnrs-dsi]

I try to ping a local wlc interface.

I have manually changed channels. Activate WMM on clients and it's look better.

Thanks for your help.

[Scott Fella]

Its really normal.. Here is a screen shot from my iPhone.

Sent from Cisco Technical Support iPhone App